Alert archive / Delaware / Areal Flood Advisories in 2009

Areal Flood Advisory 17, NWS Philadelphia/Mount Holly

June 11, 2009Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 11, 2009, 5:30 PM EDT for Kent County, Sussex County, Delaware. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 11, 2009, 5:30 PM EDT (21:30 UTC)
Expired: Jun 11, 2009, 8:30 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 7 km from the middle of the area, began a volume at 21:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Jun 11, 4:15 PM EDT, 1 hour 15 minutes earlier.

Area forecast discussion, Jun 11, 4:15 PM EDT, 1 hour 15 minutes before

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Hazardous weather outlook, Jun 11, 4:07 PM EDT, 1 hour 23 minutes before

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In the hours before

Special weather statement, Jun 11, 4:55 PM EDT, 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
455 PM EDT THU JUN 11 2009

DEZ002-003-112145-
INLAND SUSSEX DE-KENT DE-
455 PM EDT THU JUN 11 2009

...A STRONG THUNDERSTORM WILL AFFECT KENT AND SUSSEX COUNTIES...

AT 452 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES NORTH OF GEORGETOWN...MOVING NORTHEAST
AT 20 MPH. THE THUNDERSTORM WILL BE NEAR SLAUGHTER BEACH AROUND 505
PM...BIG STONE BEACH AROUND 515 PM AND BIG STONE BEACH AROUND 520 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM COULD PRODUCE SMALL HAIL AND GUSTY WINDS AS WELL. IF YOU
HEAR THUNDER...GO INDOORS.

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 3:15 PM EDT	Flash Flood Watch	PHI	Morris, Sussex, Warren	13 hr
Jun 11, 4:10 PM EDT	Coastal Flood Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	12 hr

Nearby

Areal Flood Advisories in Delaware, 2009 Every areal flood advisory in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.